Bluetooth Module with antena output

[StarHawk__]

Hello,

I have a question about antenna output in BT module. What purpose does it have? Is it necessary to BT Audio work properly?

And another question, what should I do when I try to change or pause music on radio but when I do it, music stops playing in car and title is visible. When I play song from my phone title is not visible on radio but music is playing in car.

Can someone help me with this issue?

(Sorry for my bad grammar, I’m from Poland. Polish forums can’t help me)